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Multiplet supercurrent in Josephson tunneling circuits
by André Melo, Valla Fatemi, Anton R. Akhmerov
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Submission summary
| Authors (as registered SciPost users): | Anton Akhmerov · Valla Fatemi · André Melo |
| Submission information | |
|---|---|
| Preprint Link: | https://arxiv.org/abs/2104.11239v4 (pdf) |
| Code repository: | https://zenodo.org/record/5552380 |
| Date accepted: | 2021-11-10 |
| Date submitted: | 2021-10-07 10:47 |
| Submitted by: | Melo, André |
| Submitted to: | SciPost Physics |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Theoretical |
Abstract
The multi-terminal Josephson effect allows DC supercurrent to flow at finite commensurate voltages. Existing proposals to realize this effect rely on nonlocal Andreev processes in superconductor-normal-superconductor junctions. However, this approach requires precise control over microscopic states and is obscured by dissipative current. We show that standard tunnel Josephson circuits also support multiplet supercurrent mediated only by local tunneling processes. Furtheremore, we observe that the supercurrents persist even in the high charging energy regime in which only sequential Cooper transfers are allowed. Finally, we demonstrate that the multiplet supercurrent in these circuits has a quantum geometric component that is distinguinshable from the well-known adiabatic contribution.
List of changes
- Added analytical expression of the classical quartet supercurrent
- Computed quartet current-phase relation with and without Berry curvature contribution
- Clarified quantity plotted in Fig. 3b
- Extended discussion about connection with SNS experiments
Published as SciPost Phys. 12, 017 (2022)
Reports on this Submission
Report #1 by Regis Melin (Referee 1) on 2021-10-15 (Invited Report)
Report
The authors convincingly answered my comments. The manuscript is important to the field and will certainly inspire future works. I am glad to recommend publication.